Speed governor for internal-combustion engines



I. w. MADISON. v SPEED GOVERNOR FOR INTERNAL COMBUSTION ENGINES.

APPLlCATION FILED OCT- 7. I920.

Patented Mar. 7, 1922;.

2 SHEETS-SNEET 1.

r J. W. MADISON. SPEED GOVERNOR FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED OCT. b.1920.

1 4095115. PtentedMar 7,1922.

2 SHEETS-SHEET 2.

gwbentoz J14. Ala Q 150,

JOHN WILL MADISON, or REIDSVILLE, NORTH CAROLINA.

SPEED GOVERNOR FOR INTERNAL-COMBUSTION ENeINEs.

Specification of Letters Patent.

Patented Mar. 7, 1922.

Application filed October 7, 1920; Serial N6. 415,426.

T 0 all e0 7mm it may concern Be it known that I, JOHN WVILL MADISON, a citizen of the United States, residing at Reidsville, in the county of Rockingham and State of North Carolina, have invented certain new and useful Improvements in a Speed Governor for Internal-Combustion Engines, of which the following is a specification.

This invention relates to speed governors for tractors and the like.

The object of the invention is to provide a gas engine governor so constructed that the engine may be set to run at any'desired speed within its limit and automatically retained at such speedunder'all conditions.

Another object is to provide such an attachment which may also be manually controlled when desired.

Another object is to provide an attachment of this character equipped with connected automatic and hand controlled levers provided with means for yieldably holding them in adjusted position.

lVith these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claim, and in the drawings illustrative of the preferred embodiment of theinvention.

In the accompanying drawing,

Figure 1 represents a side elevation of a portion of a tractor engine with this improved attachment shown applied.

Fig. 2 is an enlarged side elevation of the attachment detached.

Fig. 3 is a detail plan view of the governor proper, and,

Fig. 4 is a detail transverse section thereof taken on the line 44t of Fig. 2.

The attachment constituting this invention comprises a frame 1 in the form of a plate having longitudinally spaced transversely extending slots 2 therein which are designed to receive. two of the cylinder head bolts for connecting the frame to the engine, itbeing of course understood that these bolts are first removed and then replaced after passing them through said slots 2.

Extending laterally from one side edge of the frame 1 at opposite ends thereof are two arms 3 carrying at their free ends bearings 4 in which is rotatably mounted the governor shaft 5. This shaft 5 extends beyond the outer edges of the arms 3 and carries at one end a governor driving pulley 6 wh ch is driven from the engine fan belt and at its other end has a set collar 7 for taking the thrust of the governor shaft.

Mounted 'on the shaft 5 are the spring carried collars 8 and 9 of the governor, collar 9 being fixed to the shaft by a set screw whilecollar 8 is free to slide on the shaft and is provided with an annular groove 12 to recelve one end of a control lever 20 hereinafter to be described. The collars 8 and 9 are connected by the usual fiat leaf springs 10 on which are mounted the governor weights or balls 11.

A shapedplate 13 is secured at one end to the engine and at its other end is connected with a bracket arm 14 on frame 1 as is shown clearly in Fig. 3. A' bell crank lever which will be herein termed the automatic controllever is shown at 20 and is fulcrumed on lever 15 the free end of the short arm of the said lever 20 being engaged with the groove 12 in collar .8 so that said lever will be controlled by the sliding movement of said collar on the governor shaft as will be hereinafter more fully described.

'The lever 15 has its upper end offset in wardly as shown at 16-to adapt'it to be positioned between the governor shaft 5 and the plate 13. A bolt 17 extends through the upper end of lever 15 and through a transversely arranged slot 13 in the plate 13 and a coiled spring 18 is mounted on the bolt between lever 15 and the nut on the bolt and exerts its tension to hold said lever frictionally engaged with the plate so that the lever may be adjusted at any desired position and yieldably held in adjusted position by this spring.

The bell crank lever 20 carries a rearwardly extending arm 21 having attached to its free end a counterbalance weight 22 to assist in returning the lever to normal position after it has been actuated. The free end of the long arm of the lever 20 has a ball and socket connection shown at 23 with the carbureter valve not shown for a purpose presently to be described.

A reach rod 19 connects the upper end of lever 15 with another lever 24 mounted ona plate 25 which is fastened to the engine near the drivers seat. This plate may be fastened in any suitable manner, a bracket 26 being here shown for connecting it to the engine. The plate 25 has a transversely extending arcuate slot 27 in its upper end, through which. passes a bolt 28 similar to the bolt 17 which connects lever 15 to plate 13. This bolt 28 passes through lever 2a intermediate its ends and has positioned there- I on a coiled spring 28 between the head of the bolt and lever 24 so as to frictionally hold said lever in engagement with plate 25 adapting it to remain in adjusted position after it has once been placed or set in such position.

From the above description it will be obvious that a gas engine equipped with the attachment constituting this invention may have the speed thereof controlled both manually and automatically and the driver may after setting the machine to run at the desired speed leave it so set and the governor will: automatically maintain the tractor or other apparatus on which the engine is mounted at the set speed under all conditions.

It is of course understood that when the attachment is set by moving the levers 24 and 15 at the position desired for certain speed these levers operating through lever 20 Should it be desired for any reason to manually change the speed of the engine the driver may readily do so by actuating the hand control leverQl t which through the reach rod 19, lever 15 and lever 20 will operate the carbureter valve for supplying more or less gas to the engine.

The preferred embodiment of the invention is disclosed in the drawings and set :forth in the specification, but it will be understood that any modifications within the scope of the claim may be made in the construction without departing from the principle of the invention or sacrificing any of its advantages.

What is claimed is: 7

An attachment of the class described comprising two plate like brackets adapted to be mounted at points remote, each having a lever pivoted at one end to one end of the plate and provided atits other end with an arcuate transversely arranged slot, each lever having a lateral extension yieldably mounted in the slot of the plate on which it is-mounted, a rod connecting thelevers, a

centrifugal governor mounted adjacent one of said brackets, and having means for connection with an engine drive shaft, a bell crank lever fulcrumed on the lever of the bracket adjacent the governorand having one end engaged with the sliding member of the governor and the other provided with means for connection with the carbureter valve which supplies fuel to the engine, and means connected with said bell crank to as sist in returning it to normal position atte actuation.

In testimony whereof, Iafiix my signature hereto.

JOHN WILL MADISON. 

